Bittiolum varium, common name the grass cerith, is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae. Distribution Bittiolum varium occurs in shallow waters ( depth) of the Western Atlantic between the East Coast of the United States (Maryland) and Brazil. Description The maximum recorded shell length is 6.5 mm. Habitat The minimum recorded depth for this species is 0 m; maximum recorded depth is 11 m. References External links Cerithiidae Gastropods described in 1840 Molluscs of the Atlantic Ocean Taxa named by Ludwig Karl Georg Pfeiffer